chore: Optimize multi-theme switching

packages/@core/shared/toolkit/src/update-css-variables.test.ts

@@ -0,0 +1,30 @@
+import { expect, it } from 'vitest';
+
+import { updateCSSVariables } from './update-css-variables';
+
+it('updateCSSVariables should update CSS variables in :root selector', () => {
+  // 模拟初始的内联样式表内容
+  const initialStyleContent = ':root { --primaryColor: red; }';
+  document.head.innerHTML = `<style id="custom-styles">${initialStyleContent}</style>`;
+
+  // 要更新的CSS变量和它们的新值
+  const updatedVariables = {
+    fontSize: '16px',
+    primaryColor: 'blue',
+    secondaryColor: 'green',
+  };
+
+  // 调用函数来更新CSS变量
+  updateCSSVariables(updatedVariables, 'custom-styles');
+
+  // 获取更新后的样式内容
+  const styleElement = document.querySelector('#custom-styles');
+  const updatedStyleContent = styleElement ? styleElement.textContent : '';
+
+  // 检查更新后的样式内容是否包含正确的更新值
+  expect(
+    updatedStyleContent?.includes('primaryColor: blue;') &&
+      updatedStyleContent?.includes('secondaryColor: green;') &&
+      updatedStyleContent?.includes('fontSize: 16px;'),
+  ).toBe(true);
+});